First synthesis of the LaZnO3 biochar perovskite used as a photocatalyst with the enhanced deactivation mechenism and regenerable performance
Abstract This study innovatively modified LaZnO3 perovskite with waste spirulina biochar to construct a new photocatalyst system, LaZnO3-Biochar (LaZnO3-B). For the first time, the low-temperature environment in the Northern Hemisphere was simulated to explore its visible - light degradation of sulf...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-07226-9 |
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| Summary: | Abstract This study innovatively modified LaZnO3 perovskite with waste spirulina biochar to construct a new photocatalyst system, LaZnO3-Biochar (LaZnO3-B). For the first time, the low-temperature environment in the Northern Hemisphere was simulated to explore its visible - light degradation of sulfathiazole-type antibiotics and the regeneration strategy. At a low temperature of 0℃, LaZnO3-B demonstrated outstanding activity, achieving a sulfathiazole (STZ) conversion rate of 56.5% within 5 min and maintaining 52.1% after 105 min, breaking through the bottleneck of low efficiency of traditional photocatalysts at low temperatures. Density functional theory (DFT) calculations revealed its structural advantages, with more active sites and a unique core-shell structure ensuring photocatalytic performance at low temperatures and pointing out a direction for the design of novel photocatalysts. The deposition of by-products and pollutants led to the catalyst deactivation. However, simple water rinsing could restore its activity. Even after three rinses, the STZ removal rate was still nearly 50%. This regeneration strategy is simple and efficient, showing great potential for application. |
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| ISSN: | 2045-2322 |